PCB design related Links

Having returned to work after a bit of time off to be ill, I returned to find Windows 7 newly installed on my machine.
So I thought I'd sort some of my desktop links etc, mainly related to PCB design, as that is what I do, here are the first batch that I have checked, to enshure they still work.
So the following are misc. PCB design related links which may be usefull.

IPC:
http://www.ipc.org/ContentPage.aspx?Pageid=IPC
IPC Printed Board Defense Roadmap | IPC

Saturn PCB Toolkit:
PCB Via Current | PCB Trace Width | Differential Pair Calculator | PCB Impedance

Signal Integrity Etc:
Speeding Edge consultants specialize in high-speed PCB and system design disciplines
beTheSignal.com
High-Speed Digital Design Publications Archive by Keyword

Calculators:

Ohm's Law Calculators
The CircuitCalculator.com Blog PCB Via Calculator
The CircuitCalculator.com Blog PCB Trace Width Calculator
Microsoft Office 2010 Best Price - Buy & Download
Right-Angled Triangle Calculator
PARALLEL RESISTOR CALCULATOR
PCB Impedance and Capacitance Calculator
http://www.pcb123.com/help/calculators/
Skin Effect Calculator - Calculate Skin Depth
Electrostatic Capacitance Conversion - FREE Unit Converter
Electronics 2000 | Series / Parallel Resistor Calculator

EMC:
Tech Tips
EMC Information Centre - The EMC Journal (Free in the UK)

Thermal:
Calculator : Thermal conductivity for PCBs

All sorts of stuff:
Cadence Community
Index of
PCB Matrix Corp. - Mentor Graphics
All About Circuits : Free Electric Circuits Textbooks
Index of /pub/ibis
I2C bus, I2S bus, protocols, interfaces and specifications
DXF Group Codes [ACG]
Index of /products/analog/pdf/
WikiComponents
Hours Calculator

Magazines:
Printed Circuit Design & Fab Magazine Online
ICONNECT007 IConnect007 Home
+Plastic Electronics Magazine - Analysis for Organic & Printed Electronics
http://www.circuitsassembly.com/cms/
http://circuitsassembly.com/blog/?p=756

Forums:
Forum for Electronics
Mentor Graphics Communities: Community: Professor Tom's Corner

NPL PCB defect database:
Pictures of PCB and soldering problems.
National Physical Laboratory Industry Defects Database

Listening Tests for Communications:
http://www.meyersound.com/support/papers/speech/glossary.htm
 
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Hello Marc,
Wealth of info, came across this thread by accident while searching layout related threads... Thanks for the post.

Also had never (I think) visited this part of the forum. mostly roiling the solid state, pass labs and chip amp forums:D. some links are dead now though.
regards
Prasi
 
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